Clamp block



G. D. KALBERG CLAMP BLOCK Filed April 8, 1955 March 5, 1957 INVEN TOR. GAE/WV 0. M45526 BY United States Patent CLAMP BLOCK Glenn D. Kalberg, Cleveland, Ohio Application April 8, 1955, Serial No. 500,127

1 Claim. (Cl. 248361) This invention relates, in general, to clamp blocks, to be used in connection with a clamping means for clamping work pieces so as to hold the work pieces in fixed position.

One object of this invention, is to provide a clamp block which is readily adjustable in height, so as to accommodate it to the work piece to be clamped.

A further object of this invention, is to provide an adjustable clamp block which is rugged in construction, simple in design, inexpensive to manufacture, and long lived in use.

Further objects, purposes, and characteristic features, of this invention, will appear as the description progresses, reference being had to the accompanying drawings, showing, solely by way of example, and in no way, whatso ever, in a limiting sense, one form which the invention can assume.

In the drawings:

Figure 1, is a front elevation of one application of the invention;

Figure 2 is a front elevation of a second application of the invention;

Figure 3 is a front elevation, with parts broken away, of a clamp block in accordance with this invention; and

Figure 4 is a plan view of the block, in adjusted position.

Referring now to the drawings, the illustrated adjustable clamp block includes, a flat steel base plate 5, on which are stacked a number of flat steel plates 6.

The stacked plates are drilled, centrally, at one end of the stack, at 7, to receive a smooth stripper bolt 8, having a reduced threaded lower end threaded in a threaded hole 9 in the base plate, and having a head 10, bearing on a flat spring washer 11, positioned between the head and top plate 6.

Due to shoulder 8 on bolt 8, and to the length of the bolt, the bolt compresses only spring washer 11, and not the plates 6.

With this construction, without bolt 8 being loosened, any number of plates from the top of the stack can be swung away from the base and lower plates 6, against 2,783,963 Patented Mar. 5, 1957 the spring tension of washer 11. The height of the clamp block, of course, will depend upon how many of the plates 6, are left stacked on the base 5.

In Figure 4 is shown how a number of the plates 6 have been swung away from stacked position on the base.

In Figure 1, a work piece 12 is shown clamped to a base 13, by clamp heads 14, bearing on faces 15, of the work piece, and faces 16, of the adjustable clamp blocks. The faces 15 and 16 are at the same height, so that the clamp heads 14 can firmly clamp the work piece.

In Figure 2, a work piece 17, is shown as clamped to a base 18, by clamp means 19, and employing the adjustable clamp blocks of this invention. Again, it should be noted, the face 20 is at the same height as the faces 21 and 22 of the clamp blocks.

The plates 6 are shown as rectangular, but could be of other shape, if desirable, and are relatively thin, so as to permit obtaining desired heights within small limits.

Merely as one example, a block of this type was made, having a base plate thick, and stacked plates thick.

Furthermore, the plates could be made of other than steel, so long as the material is rigid enough.

The above rather specific description, of one form of this invention, has been given solely by way of example, and in no manner, in a limiting sense.

Further, all modifications, adaptations, and variations, that fall within the scope of the appended claim, are intended to be protected by this disclosure.

What is claimed is:

In an adjustable clamp block, a fiat base having a first end and a second end, and a flat top, a stack of flat superimposed and normally registered plates resting upon said top of the base including an uppermost plate, said plates having first ends and second free ends, registered holes in said first ends of the plates, a bolt having a smooth shank extending through said holes, said shank having a lower end bearing upon the top of the base, a reduced threaded terminal on the lower end of the shank threaded into the top of the base, said shank having an upper end, an enlarged head on the upper end of the shank above the stack having an underside, the distance between the underside of the head and the top of the base being slightly greater than the height of the stack of plates, and an expanding spring interposed between the underside of said head and the uppermost plate, the plates being independently pivotable on the bolt shank.

References Cited in the file of this patent UNITED STATES PATENTS 1,080,064 Huber Dec. 2, 1913 2,351,436 Ketz June 13, 1944 2,498,171 Michler Feb. 21, i950 2,541,605 Ohlsson Feb. 13, 1951 

